Truck.



E. UAMERUN,

TRUCK.

APPLICATION FILED n30.17.1913.

Patented NW. 10,1914.

Inventor Swan ea 0 K a a j a Attorneyl.

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TED STATES PATENT OFFICE.

IEWAIN' CAMERON, OF WASHINGTON, NEW JEMEY, AfiSIGNOR TO JOHN ROBERTTAYTMR, O]? BROOKLYN, NEW YORK.

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To all whom it may concern:

Be it known that T, Ewan CAMERON, a citizen of the United States, and aresident of Washington, Warren county, and State of New Jersey, haveinvented a certain new and useful Truck, of which the following is aspecification.

This invention relates to trucks of the type which are adapted to beused with platforms, said platforms having tops and sides. Theseplatforms are employed in quantities in factories, store-rooms, etc. Thetruck is adapted to be wheeled under the platform and a sub-frame on thetruck is elevated, raising thesides of the platform from the floor. Thetruck, with the platform, is then wheeled to the position desired andthe platform lowered until the sides thereof rest upon the floor, andthen the truck is wheeled out from under the platform.

The objects I have in view are to simplify the construction of this kindof truck, to make it more useful by being; made capable of turning in acircle of small radius, to make its operation more easy by having theoperating parts for raising and lowering the platform within reach ofthe operator so that he can actuate the same without bending down, andto form an automatic and efficient lock for holding the platform inelevated position. These and further objects will more fully appear fromthe following specification and accompanying drawings, consideredtogether or separately.

The drawings illustrate one embodiment V of the invention.

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In the drawings: Figure 1 is a front elevation'of a completed truckshowing a platform thereon, the sub-frame being in elevated position.Fig. 2 is a section of the same on the line of Fig. 1. Fig. 3 is a planview of the device, but with the platform removed. Fig. 4 is a sectionon the line li of Fig. 1, but on an enlarged scale, showing the detailsof the elevating and locking mechanism; and ltig. 5 is a section on theline 5 5 of Fig. 4-, showing the details of the sub-frame elevatingdevices.

lin all of the views, like parts are designated by the same referencecharacters.

'lteferring to the drawings, n: represents the top of the platform, and7) represents the sides of the same. This platform made preferably ofwood of such a size and,

specification of Letters Patent.

Application filed December 17, 1913.

Patented Nov. 10, 1914. Serial No. 807,157.

height that the truck may be wheeled under t, and the sub-frame beingelevated above the main part of the truck will lift the platform clearof the floor. The articles to be transported are either piled directlyon the platform or are arranged in trays or other supports carried bythe platform.

The truck comprises a frame 1 and a sub-frame 2. The frame is made asfollows: It has a'lower horizontal angle frame 3, rectangular in plan.Above this frame is an upper horizontal angle frame f of the same sizeand shape. At one end, designated in this specification as the frontend, is a vertical frame 5. The upper part of this frame is of such aheight that the operator can take hold of it, and without bending, canpush or pull the truck and turn it around. The frame has caster supports6, 6 at each end. Upon these supports are casters 7, 7. On the middle ofthe frame, half way between the casters, are the side wheels 8, 8. Thesewheels are supported upon a shaft 3.1, and the shaft is supported inbrackets 9. Between the upper and lower horizontal frames are shaftbearing plates 10, 10. These plates serve to hold the upper and lowerframes in position with relation to one another. The frames are alsoheld together by means of the caster supports 6, 6, and the verticalframe 5. In addition, uprights 32, opposite to the corners occupied bythe vertical angle frames, are employed.

The means for supporting and elevating the sub-frame are as follows: Inconnection with the shaft bearing plates 10 is a rear shaft 11, andfront shaft 12. Each shaft carries two arms 13, 13. In connection withthese arms are standards 14. These standards have bifurcated ends, shownin Fig. 5, connected by pins 33, to the ends of the arms 13. Thesestandards have reduced cylindrical portions which pass through openingsin the side members of the upper horizontal angle frame 4, and engagewith and are connected to the sub-frame. For the purpose of osci-llatinthe shafts 11 and 12, the shaft 12 is provi ed with a long arm 15, andthe shaft 11 is provided with a short arm 16. The arm 15 is connected tothe shaft so that the portion extending below the shaft is equal inlength to the arm 16. A link 17 connects these two arms so that theymove together. For the purpose of THO moving the long arm 16, a screwshaft 18 is provided and is connected to this arm by means of a link 19.This construction is best shown in Fig. 1. The screw shaft '18 engageswith an internally threaded hollow shaft 20. This shaft is mounted in abearing 21 on a horizontal "channel 22. A split keeper :23 is attachedto the inner side of the channel and engages with grooves in the outsideof the internally threaded hollow shaft and keeps it seated against itsbearing 21. For the purpose of rotating the shaft 20, a pulley 24: isprovided. This pulley is engaged by a chain 25, which passes over apulley 26. The pulley 26 is carried upon a horizontal brace 27, and isprovided with a crank 28. The purpose of employing two pulleys and achain is to raise the crank to a position where the operator can turn itwithout bending down, and thus avoid the fatigue incident to constantbending.

The sub-frame 2 comprises side members 29 of flat strip material havingthe front ends bent up as shown, and the rear ends bent down, so thatthey will slide readily under the platform. The bent up endsareconnected together by an angle iron 30. This angle has a part of itsweb cut away so as to allow the arm 15 to swing to the extreme backwardposition, as shown in dotted lines in Figs. 2 and 1. The side members 29of the sub-frame are connected to the standards 14, by any suitableconnection. The connection illustrated is made by passing the standardsthrough threaded holes in the sub-frame.

The operation of the device is apparent from the foregoing description.The operator turns the crank 28 in one direction or the other. This hasthe eflect of turning the internally threaded hollow shaft 20 and movingthe threaded shaft 18 in one direction or the other. Through the agencyof the link 17, both rock shafts will be oscillated to the same amount,and both ends of thesub-frame will be elevated or depressed. The pitchof the thread on the shaft 18 is such that, irrespective of the weightupon the sub-frame, the shaft 20 will not be turned thereby. Y Onefeature of the invention is illustrated in Fig. 1. It will be observedthat the threaded portion of the hollow shaft 20 is of limited extentcompared to the length of the shaft, and this threaded portion islocated at the extreme rear end of the shaft. The effect of this is thatthe shaft 18 will never project beyond the front end of the shaft 20when the shaft 18 is in the extreme forward position, and at the sametime, only enough screw-threads will be employed in the shaft 20 to geta proper engagement with the shaft 18. If the shaft 20 were threadedthroughout its entire length, there would be too much friction upon theshaft 18 when the shaft 18 were in the extreme forwardmost position.

In accordance with the provisions of the' patent statutes, I havedescribed the principle of my invention, together with the apparatuswhich I now consider to represent the best embodiment thereof; but Idesire to have it understood that the apparatus shown is merelyillustrative and that the invention may be carried out in other ways.

Having now described my invention, what I claim as new and desire tosecure by Letters Patent, is

1. A truck having in combination a frame, a vertical member rigidlysecured to one end of the frame, a sub-frame, standards supporting thesub-frame and carried by the frame, rock shafts carried by the frame andconnected to the standards, a screw-shaft, connections between thescrewshaft and the rock shafts, a hollow threaded shaft associated withthe screw-shaft and means for rotating the hollow shaft.

2. A truck having in combination a frame, a vertical member rigidlysecured to one end of the frame, a sub-frame, standards supporting thesub-frame and carried by the frame, rock shafts carried by the frame andconnected-to the standards, a screw-shaft, connections between thescrewshaft and rock shafts, a hollow threaded shaft associated with thescrew-shaft, a wheel to turn the hollow shaft, a second wheel adjacentto the top of the member and a chain connecting the two wheels.

3. A truck having in combination a frame, a vertical member rigidlysecured to one end of the.frame, a sub-frame, standards supporting thesub-frame and carried by the frame, rock shafts carried by the frame andconnected to the standards, a

screw-shaft, connections between the screw shaft and rock shafts, ahollow threaded shaft associated with the screw-shaft and means forrotating the hollow shaft, the said hollow shaft being threaded for aportion of its length only, and adjacent to the end next to thesub-frame.

4. A truck having in combination a frame, a vertical member rigidlysecured to one end of the frame, a sub-frame, standards supporting thesub-frame and carried by the frame, rock shafts carried by the frame and.connected to the standards, a screw-shaft, connections between thescrewshaft and rock' shafts, a hollow threaded shaft associated with thescrew-shaft, means for rotating the hollow shaft and a split keeperassociated with the hollow shaft.

5. A truck having in combination a frame, a. vertical member rigidlysecured to one end of the frame, a sub-frame,standards supporting thesub-frame and carried by the frame, rock shafts carried by the nationalframe and connected to the standards, a screw-shaft, connections betweenthe screwshaft and rock shafts, a hollow threaded shaft associated withthe screw-shaft, a wheel to turn the hollow shaft, a second wheeladjacent to the top of the member and a chain connecting the two wheels,the said hollow shaft being threaded for a portion of its length. only,and adjacent to the end next to the sub-frame.

6. A truck having in combination a frame, a vertical member rigidlysecured to one end of the frame, a sub-frame, standards supporting thesub-frame and carried by the frame, rock shafts carried by the frame andconnected to the standards, a screw-shaft, connections between thescrewshaft and rock shafts, a hollow threaded shaft associated with thescrew-shaft, a wheel to turn the hollow shaft, a second wheel adjacentto the top of the member, a chain connecting the two wheels and a splitkeeper associated with the hollow shaft.

7. ill. truclr having; in combination a main frame, a member rigidlysecured to one end of the frame, said member forming a handle tomanipulate the truck, a sub-frame movable relatively to the main frame,standards carried in the main frame and supporting the subfraine, rockshafts jonrnaled in the main frame and connected to rock in unison, armscarried by the rock shafts and pivoted to the standards, a pulley havinga tubular hub, a nut in one end of the hub, a circumferential groove inthe hub, a split plate secured to the member and engaging the groove, ascrew-shaft engaging the nut, connections between the screw-shaft androclr shafts for oscillating the latter, and means carried by the upperpart of the member for rotating the not.

This specification signed and witnessed this 2nd day of December, i913-EWAN CAMERON,

Vl itnesses 2 'lnos, W. :HALUEMAN, 'fnos. Daemon.

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